2020BS EN 60947-5-1:2017 Low-voltage switchgear and controlgear. Control circuit devices and switching elements. Electromechanical control circuit devices
2004BS EN 60947-5-1:2004+A1:2009 Low-voltage switchgear and controlgear — Part 5-1: Control circuit devices and switching elements — Electromechanical control circuit devices
2004BS EN 60947-5-1:2004 Specification for low-voltage switchgear and controlgear - Control circuit devices and switching elements - Electromechanical control circuit devices
1998BS EN 60947-5-1:1998 Specification for low-voltage switchgear and controlgear - Control circuit devices and switching elements - Electromechanical control circuit devices